H13-723_V2.0 · Question #101
When adding a RegionServer host to an HBase cluster, you must stop the original cluster first, because HBase does not support dynamic expansion.
The correct answer is B. False. B is correct because HBase is specifically designed to support dynamic (online) expansion - you can add a new RegionServer to a running cluster by simply starting the RegionServer process on the new host, and it will automatically register itself with the HMaster via ZooKeeper…
Question
When adding a RegionServer host to an HBase cluster, you must stop the original cluster first, because HBase does not support dynamic expansion.
Options
- ATrue
- BFalse
How the community answered
(36 responses)- A19% (7)
- B81% (29)
Explanation
B is correct because HBase is specifically designed to support dynamic (online) expansion - you can add a new RegionServer to a running cluster by simply starting the RegionServer process on the new host, and it will automatically register itself with the HMaster via ZooKeeper. The cluster continues serving requests throughout this process with zero downtime.
A is wrong because stopping the cluster is completely unnecessary and would cause unacceptable downtime in production environments; HBase's architecture with ZooKeeper as the coordination layer was built precisely to allow live membership changes.
Memory tip: Think of HBase RegionServers like workers joining a shift - the factory (cluster) doesn't shut down just because a new worker walks in and clocks in. The manager (HMaster) simply assigns them tasks (regions) and work continues.
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